/**
 * Calculate the price after applying a discount.
 *
 * @param price - The original price.
 * @param discount - The discount percentage to apply.
 * @param decimal - The number of decimal places to round to (default is 2).
 *
 * @example
 * ```ts
 * calculateDiscountedPrice(100, 10, 1); // returns 90.0
 * ```
 */
export declare function calculateDiscountedPrice(price: number, discount: number, decimal?: number): number;
/**
 * Calculate the discount amount from the original price.
 *
 * @param price - The original price.
 * @param discount - The discount percentage.
 * @param decimal - The number of decimal places to round to (default is 2).
 *
 * @example
 * ```ts
 * calculateDiscountAmount(100, 10, 1); // returns 10.0
 * ```
 */
export declare function calculateDiscountAmount(price: number, discount: number, decimal?: number): number;
/**
 * Calculates the discount percentage between the market price and the sale price for profit.
 *
 * @param marketPrice - The original market price of the item.
 * @param salePrice - The sale price of the item.
 * @param decimal - The number of decimal places to round the result to(optional with default value = 2).
 *
 * @example
 * ```ts
 * calculatePercentageProfit(100, 80); // Returns 20.00
 * calculatePercentageProfit(100, 80, 1, false); // Returns 25.0
 * ```
 */
export declare function calculatePercentageProfit(marketPrice: number, salePrice: number, decimal?: number): number;
/**
 * Calculates the discount percentage between the market price and the sale price for discount.
 *
 * @param marketPrice - The original market price of the item.
 * @param salePrice - The sale price of the item.
 * @param decimal - The number of decimal places to round the result to(optional with default value = 2).
 *
 * @example
 * ```ts
 * calculatePercentageDiscount(100, 80); // Returns 20.00
 * calculatePercentageDiscount(100, 80, 1, false); // Returns 25.0
 * ```
 */
export declare function calculatePercentageDiscount(marketPrice: number, salePrice: number, decimal?: number): number;
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